Threshing-machine cylinder.



A. M. MASON.

THRESHING MACHINE CYLINDER.

APPLICATION FILED APR.8. 191a.

1,302,5MB Patented May 6,1919.

am-uamtoz diam 17. fia 9w? IINID @Aflfl ATENT @FFIQE.

ALVIN M. MASON, 0F BOZEIVIAN, MONTANA.

THRESHING MACIIINE CYLINDER.

rename.

Application filed April 8,

To all whom it may concern:

Be it known that I, ALVIN M. Mason, a citizen of the United States,residing at Bozeman, in the county of Gallatin and State of Montana,have invented certain new and useful Improvements in Threshing-MachineCylinders, of which the following is a specification.

The invention relates to improvements in threshing machine cylinders,and more particularly to means for fixedly securing or looking thetoothed cylinder bars to the opposite heads of the cylinder to insureagainst side and rotary movement or other displacement of the bars andto maintain the same in proper rigid relation to the cylinder.

The broad object in view is the provision of improved means of theforegoing character embodying novel features of construction, comprisinga minimum of parts with consequent simplicity, possessing the utmoststrength and rigidity, and allowing for independent removal andreplacement of the cylinder bars with ease and facility.

The invention further resides in the novel construction, arrangement,and combination of parts as will be hereinafter fully pointed out anddescribed in connection with the accompanying drawings, in which Figure1 is a view in elevation of a fragment of a cross-bar annular cylinderencircling supporting member, the supporting member being shown asprovided with a socket in which is mounted or inserted in lockedrelation a flanged bar-lock member adapted to secure the cross-bar inproper relation to the cylinder, the cross-bar being indicatedsectionally.

Fig. 2 is a top plan view of the elements of Fig. 1.

Fig. 3 is a fragmental perspective view of a cross-bar provided with thebar securing device of my invention.

Fig. 4 is a fragmental perspective view of the aforementioned cross-barsupporting member provided with the bar lock receiving socket of theinvention.

Referring more specifically to the drawings, the numeral 1 designates anannular cross-bar supporting member which usually embraces the oppositeheads of the cylinder of a threshing machine, the same being fixedlysecured to said heads. In carrying out my invention I provide said barsupporting member -with the required number of transverse slots such asillustrated.

Specification of Letters Patent.

Patented May 6, 1919.

1918. Serial No. 227,312.

Each slot comprises a circular curved face portion 2 beginning at oneedge of the slot and extending to a point where the curved face isinterrupted by a flat faced abutment or stop 3 which abutment or stopextends from the opposite edge of the slot to the point where it meetsthe curved portion 2. The opposite side edges of the curved face portion2 of the socket are chamfered or beveled ofl as at 4, the bevelsextending from the upper face of the supporting member 1 where the scopeof thebevels is deepest and gradually merging with the side faces of thesupporting member.

The cross-bars of the cylinder which carry the bar teeth 5 are formedwith the integral securing members adapted to be fitted tightly in theaforementioned sockets. Each securing member is substantially anenlargement projecting right angularly from the bar and consisting of acircularly curved face 6 extending from one edge of the flat top face ofthe cross-bar to apoint where the curve meets a flattened ofl face 7 ofa cuneate groove 8 extending through the thickness of the cross-bar andoppositely thereof to the curved face 6. A pair of curvilinear flanges 8are spaced apart by the face 6 and project outwardly, said flangesdiverging from one another and gradually curvin to merge with the face6. Then the 100 -member is fitted into the slot by a rotary movement theflanges will engage in wedge fashion with the tapered beveled oifportions 4, rotary movement being limitedand the locking member confinedin the slot by engagement of the stop 3 with the flat face 7 of theslot. In accomplishing the removal and replacement of the bars theoutstanding bar teeth 5 may be utilized as a leverage means.

Having described my invention, I claim l. A device of the characterdescribed consisting of a supporting member pro vided with a transverseslot or recess, said slot or recess being formed with a circularlycurved face extending from one upper edge of the slot'and terminating ata point where the same meets the flat face of an abutment or stop, thelatter extending inwardly from the remaining upper edge of the slot,beveled off portions at opposite sides of said curved face said portionsex tending from the upper face of the supporting member and graduallytapering to merge with the side faces of the supporting member; and abar locking member formed and proportioned to fit said slot and engagesaid beveled off portions, said member having a circularly curved faceadaptedto engage the curved face of'the slot, a cuneate groove having afiat face adapted to engage the stop of the slot, and a pair ofcurvilinear flanges spaced apart by the curved face of the lockingmember, said flanges diverging from one another and gradually curving tomerge with the latter curved face and being adapted to engage thebeveled off portions of the supporting member.

2. A tooth bar having a rounded face and spaced locking flanges formingfriction members and said rounded face terminating in a flat abutmentface opposite the friction members.

In testimony whereof I afiiX my signature.

ALVIN M. MASON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

